Solved problem by disabling MAC address...... We use it for sharing internet coming through lan wire n playing CoD MW !
Ya wired lan was working earlier......
Another problem, i brought lan wire from my friend's room. I connected it to my Y500, it shows limited n no internet access(same problem with another laptop too, win8) but its working in 3 other laptops(win8).
What could be the problem ? I haved tried disabling n re enabling my ethernet device , also troubleshooting....